UUID in Databases: PostgreSQL, MySQL, MongoDB
Store UUIDs efficiently in relational and NoSQL databases. Covers index performance, storage size, and native UUID types in major databases.
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Tags: developer-tools, uuid, databases
UUID in Databases: Best Practices for PostgreSQL, MySQL, MongoDB Using UUIDs as primary keys is common, but the implementation details matter enormously for performance. A UUID stored as a in MySQL behaves very differently from a UUID stored as a native type in PostgreSQL. This guide covers storage options, index performance, generation strategies, and the practical tradeoffs for the three most common databases. --- Why Use UUIDs as Primary Keys? Sequential integer IDs (1, 2, 3, ...) are the path of least resistance and the right choice for many applications. But there are legitimate reasons to reach for UUIDs: Distributed ID generation. Multiple application servers, microservices, or shards can generate IDs independently without coordinating with a central source. No information leakage.…
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